Which exercise works best for insulin resistance in kids with extra weight?

When a child or teen is carrying extra weight, their body can start to struggle with using insulin properly—a condition called insulin resistance. This can set the stage for future health problems. So, what's the best way to use exercise to help? A major review of past research, involving over 3,200 young people, tried to answer that by comparing different workout styles. It found that short bursts of very intense exercise, known as high-intensity interval training or HIIT, were most effective at lowering fasting insulin levels and a key resistance marker called HOMA-IR. For directly lowering fasting blood sugar, a combination of aerobic exercise (like running) and resistance training (like lifting weights) worked best. The analysis showed that aerobic exercise on its own improved all three markers, while resistance training alone didn't show significant effects—though it did provide a crucial boost when added to other exercises in a combined program. It's important to note this is a review of existing evidence, showing associations, not direct cause-and-effect from a single new trial. The researchers also noted some 'small-study effects' for certain outcomes, which means results from smaller studies might slightly overstate the benefits. Most importantly, while this points to promising strategies, the review itself concludes that future research needs to define the optimal intensity and duration of these exercises for young people.